647955

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1$

素因数の和:57

約数の個数: 72

約数和(自身を含む): 1493856

約数和(自身を除く): 845901

約数列:

[1, 3, 5, 7, 9, 11, 15, 17, 21, 33, 35, 45, 51, 55, 63, 77, 85, 99, 105, 119, 121, 153, 165, 187, 231, 255, 315, 357, 363, 385, 495, 561, 595, 605, 693, 765, 847, 935, 1071, 1089, 1155, 1309, 1683, 1785, 1815, 2057, 2541, 2805, 3465, 3927, 4235, 5355, 5445, 6171, 6545, 7623, 8415, 10285, 11781, 12705, 14399, 18513, 19635, 30855, 38115, 43197, 58905, 71995, 92565, 129591, 215985, 647955]

約数ペア:

[(1, 647955), (3, 215985), (5, 129591), (7, 92565), (9, 71995), (11, 58905), (15, 43197), (17, 38115), (21, 30855), (33, 19635), (35, 18513), (45, 14399), (51, 12705), (55, 11781), (63, 10285), (77, 8415), (85, 7623), (99, 6545), (105, 6171), (119, 5445), (121, 5355), (153, 4235), (165, 3927), (187, 3465), (231, 2805), (255, 2541), (315, 2057), (357, 1815), (363, 1785), (385, 1683), (495, 1309), (561, 1155), (595, 1089), (605, 1071), (693, 935), (765, 847)]